diff --git a/.github/scripts/check-commandcode-model-metadata.ts b/.github/scripts/check-commandcode-model-metadata.ts
index 7182cc5..bfc72ab 100644
--- a/.github/scripts/check-commandcode-model-metadata.ts
+++ b/.github/scripts/check-commandcode-model-metadata.ts
@@ -1,5 +1,5 @@
 import { execFile } from "node:child_process"
-import { appendFile, mkdtemp, readFile, rm } from "node:fs/promises"
+import { mkdtemp, readFile, rm } from "node:fs/promises"
 import { tmpdir } from "node:os"
 import { join, resolve } from "node:path"
 import { pathToFileURL } from "node:url"
@@ -302,9 +302,6 @@ async function main(): Promise<void> {
 
   console.log(report)
 
-  const summaryPath = process.env.GITHUB_STEP_SUMMARY
-  if (summaryPath) await appendFile(summaryPath, report, "utf-8")
-
   if (hasModelMetadataDiff(diff)) {
     throw new Error(
       `Static model metadata differs from command-code@${upstreamPackage.packageVersion}. Update src/models.ts and the snapshot version.`,
diff --git a/.github/workflows/model-metadata.yml b/.github/workflows/model-metadata.yml
index c933905..809eef8 100644
--- a/.github/workflows/model-metadata.yml
+++ b/.github/workflows/model-metadata.yml
@@ -1,6 +1,14 @@
 name: Command Code model metadata
 
 on:
+  pull_request:
+    branches: [main]
+    paths:
+      - ".github/scripts/check-commandcode-model-metadata.ts"
+      - ".github/workflows/model-metadata.yml"
+      - "src/core.ts"
+      - "src/models.ts"
+      - "tests/test-model-metadata-check.ts"
   schedule:
     - cron: "17 6 * * *"
   workflow_dispatch:
@@ -25,4 +33,7 @@ jobs:
           registry-url: https://registry.npmjs.org
       - run: npm ci
       - name: Compare static metadata with the latest Command Code CLI
-        run: npm run check:model-metadata
+        run: npm run check:model-metadata | tee model-metadata-report.md
+      - name: Publish metadata report
+        if: always()
+        run: cat model-metadata-report.md >> "$GITHUB_STEP_SUMMARY"